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1. (WO1992010459) GOLD CARBOXYLATES AND PROCESS FOR PREPARING THE SAME
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CLAIMS
What is claimed is:
1. A method of preparing gold salts of organic acids characterized by the steps comprising
(A) preparing a mixture of
(1) at least one alkali or alkaline earth metal salt of a carboxylic acid comprising at least 2 carbon atoms,
(2) at least one gold salt having an anion other than the carboxylate anion of (A) (1) , and
(3) an organic liquid capable of at least partly dissolving the at least one alkali or alkaline earth metal salt (1) and the at least one gold salt (2), which is not a solvent for a salt formed between the alkali or alkaline earth metal of (1) and the anion of (2) ; and
(B) maintaining the mixture (A) at a temperature below the decomposition temperature of components (1) , (2) and (3) and gold carboxylate product for a period of time sufficient to form the gold carboxylate.
2. The method of claim 1 wherein the organic liquid comprises a ketone, a hydroxy-containing organic compound, an aromatic hydrocarbon, or a saturated ether, or a mixture thereof.
3. The method of claim 1 wherein the organic liquid comprises acetone, methyl ethyl ketone, ethanol, propanol, xylene or tetrahydrofuran, or a mixture thereof.
4. The method of claim 1 wherein said alkali or alkaline earth metal salt (1) comprises at least one aliphatic carboxylic acid containing from about 4 to about 30 carbon atoms.
5. The method of claim 1 wherein the metal of said alkali or alkaline earth metal salt of an organic carboxylic acid is an alkali metal.

6. The method of claim 1 wherein the gold salt comprises gold trichloride or tetrachloroauric acid, or a mixture thereof.
7. The method of claim 1 conducted at a temperature in the range from about 20° to about 100°C.
8. The method of claim 1 further comprising
(C) filtering the product produced in (B) and recovering the filtrate;
(D) evaporating the organic liquid of (A) (3) from the filtrate to form a filtrate residue;
(E) treating the filtrate residue with a second organic liquid different from the organic liquid of (A) (3) ; and
(F) filtering the second organic liquid containing the dissolved filtrate residue.
9. The method of claim 1 wherein the filtrate contains at least 80 weight-percent gold carboxylate yield.
10. The method of claim 8 wherein the filtrate contains at least 90 weight-percent gold carboxylate yield.
11. The method of claim 9 wherein at least about 80 weight-percent of the organic carboxylic acid of (A) (1) is at least one aliphatic carboxylic acid having from 6 to about 30 carbon atoms.
12. The method of claim 1 wherein the ratio of the alkali or alkaline earth metal salt (A) (1) to the gold salt (A) (2) in step (A) is in the range from about 1:1 to about 10:1.
13. The method of claim 1 consisting essentially of the steps of:
(A) preparing a mixture of
(1) at least one alkali or alkaline earth metal salt of a carboxylic acid having from about 2 to about 30 carbon atoms,
(2) at least one gold chloride, and (3) an organic liquid capable of at least partially dissolving the at least one alkali or alkaline earth metal salt of an organic carboxylic acid (1) and the at least one gold chloride (2), which is not a solvent for a salt formed between the alkali or alkaline earth metal of (1) and the chloride of (2) ; and
(B) maintaining the mixture of (A) at a temperature in the range from about 0° to about 150°C for a period of time sufficient to form the gold carboxylate.
14. The method of claim 13 wherein the carboxylic acid of (A) (1) comprises at least one aliphatic carboxylic acid having from about 6 to about 18 carbon atoms.
15. The method of claim 14 wherein the organic liquid comprises a ketone.
16. The method of claim 14 wherein the gold chloride comprises gold trichloride and the organic liquid comprises acetone.
17. The method of claim 14 wherein the temperature of the mixture (B) is maintained in the range from about 45° to about 80°C.
18. The method of claim 14 further comprising:
(C) filtering the product of (B) and recovering the filtrate;
(D) evaporating the organic liquid of (A) (3) from the filtrate to form a filtrate residue; and
(E) treating the filtrate residue with a second organic liquid different from the organic liquid of (A) (3) to dissolve the desired gold carboxylate.
19. The method of claim 18 wherein the organic liquid of (A) (3) comprises a ketone and the second organic liquid of (D) comprises a hydroxy-containing organic compound.
20. The method of claim 18 wherein the organic liquid of (A) (3) is acetone and the second organic liquid of (D) is xylene.

21. The method of claim 13 wherein the alkali or alkaline earth metal of (A) (1) comprises sodium or potassium.
22. The method of claim 13 wherein the alkali or alkaline earth metal salt of a carboxylic acid of (A) (1) is an alkali or alkaline earth metal salt of propionic acid, butyric acid, isopentanoic acid, hexanoic acid, 2-ethyl- butyric acid, nonanoic acid, decanoic acid, 2-ethylhexanoic acid, isooctanoic acid, isononanoic acid, neodecanoic acid, dodeσanoic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, naphthenic acids, tall oil acids, or rosin acids, or a mixture thereof.
23. A gold carboxylate characterized by the formula:
0
Aux(R(C-0)y)2 (I)
wherein R represents an organic group of valence y and x, y and z each represent a positive integer such that x -. γ' z/3.
24. The gold carboxylate of claim 23 wherein R represents an aliphatic group having from 1 to about 29 carbon atoms, an alicyclic group having from 4 to about 29 carbon atoms or an aromatic group having from 6 to about 29 carbon atoms.
25. The gold carboxylate of claim 23 wherein R represents an aliphatic group having from about 5 to about 17 carbon atoms.
26. The gold carboxylate of claim 25 wherein x and y each represent the number 1 and z represents the number 3.
27. A composition comprising a gold carboxylate characterized in that it is produced according to the method of claim 1.

28. A composition comprising a gold carboxylate characterized in that it is produced according to the method of claim 10.
29. A composition comprising a gold carboxylate characterized in that it is produced according to the method of claim 13.